Cylinder drain-cock



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(No Model.) BH P GYLINDBR DRAIN GOGK. No. 472,855. Patented Apr. 12, 1892.

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i l x l l l f EL WWW/MQ UNITED STATES PATENT OFFICE.

ROY PETER OAPWELL, OF LINDEN, NEW YORK.l

CYLINDER DRAm-cocK.

SPECIFICATION forming partof Letters Patent No. 472,855, dated April 12, 1892.

Application tiled August 8, 1891.

To all whom it may concern: 4 Be it known that I, ROY PETER CAPWELL, of Linden, in the county of Genesee and State of New York, have invented a new and Improved Drain-Ooek for Steam-Cylinders, of which the following is a full, clear, and exactv description.

vThe object of the invention is to provide new and improved drain-cock which is simple and durable in construct-ion and designed for automatically draining the water of condensation from the ends of the steam-engine cylinder without waste of steam and consequent loss of power.

The invention consists of a valve-body connected with the ends of the cylinder and containing two valve-seats adapted to be alternately engaged by two valves .held on stems projecting from a lever pivoted between the valve-seats.

The invention also consists of certain parts and details and combinations of the same, as will be hereinafter fully described, and then pointed outin the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification,` in which similar letters of reference indicate corresponding parts in all the views. a

Figure l is a sectional side elevation of the improvement as applied on the line w :l: in Fig. 2. a, Fig. 2 is a sectional plan view of the same'onI the line y y in Fig. 1, and Fig. 3 is a transverse section of the same on the line z .a of Fig. 1.

The steam-engine cylinder A, on which the improvement is applied, is connected at its bottom at the ends with the pipes B and C, connected with a. valve-body D, containing the chambers D and D2,.into which open the said pipes B and C through valve-seats D2 and D4, respectively. In the chambers D and D2 are formed the valve-seats E and E', respectively opening into a compartment E2, formed in the valve-body D and leading to a* discharge-pipe F for carrying off the water of condensation. The valve-seats E and E are adapted to be alternately engaged by valves G and G', respectively secured onthe valvestems II and H', respectively projeeting'from opposite sides of a lever I, fulcrumed at If in serial No. 402,131. (No man.)

so that the slightest pressure on either of the said valves G or G forces it to its seat, while seat. il\ow when the `de-vieeisin the position as sho n in Fig. l the piston in the cylinder A is on the return stroke in the direction of the arrow a', so that steam is forced through the pipe C into the chamber D2, in which the steam presses onto the valve G', so that the latter'is forced onto its seat E, the lever I swinging from right to left. This movement of the lever I throws the valve G off the seat E, so that the water accumulated in the chamber D can drain through then seat E into the compartment E2 and from the latter, through the pipe F, to the outside.

During the time the piston is on its return' stroke the valve G remains seated, so that no steam is wasted to the outside through the drain-cock. At the same time the Water of condensation in the right-hand end of the cylinder Acan pass through the pipe C into the chamber D2 to accumulate therein. Now when the piston is at the outward stroke a similar operation takes place in the chamber D-that is, the steam forced into the said of steam and permit the accumulation of Water of condensation. At the same time the other valve G is unseated and the water of condensation in the chamber D2 will ow to the compartment E2 and through the drainpipe F. It is understood that the respective valve G or G readily opens whenever the stroke of the piston changes, as the pressure is then relieved from one valve and pressure is exerted on the other valve.

In order to cut olif the chambers D and D2 from the cylinder A, valves .I and J are provided, adapted to engage simultaneously the seats D3 and D4,leading to the pipes Band C, respectively. The valves J and J are held on a valve-stem K, mounted to slide longitudinally in the valve-body D and passing through 'a recess D5, containing springs L, arranged as shown in the drawings and serving to hold valve-stem K in either a right or left hand position.

Whenin the position shown in Fig. l, the valves J and J are off the seats Ds and D4 and the drain cock operates, as above 4dethe valve-bodyD in an extension of the compaatment. 4'lhe lever I hangs vertically,

scribed. Nowin order to close the valves J Q. 1f r *l the oppTosi/tevalve or G is throw'moEits chamber closes the valve G to prevent escape IOO turn um;

and J ,one end of the'valve-stem K is formed' with a hook K","adapted to be engaged by a corresponding hook N', also arranged to press on the end of the valve J. The hook N' is formed on the inner end of a rod N, fitted to slide in a suitable stuffing-box held on the vvalve-body D and leading to thel chamber D2. "he outer end of the rod N is provided with a knob N2 for conveniently shifting the said ro rod, so as to engage the hook end N' with either the hook K' or the valve J'. Now when the operator desires to close or seat the valves .I and J' he'pushes on the knob N2, so thatthe hook N presses on the vvalveJ,andthe lat-V ter, as well as the stem K and valve J, moves to the left. As soon as the springs L have4 passed a central position they exert their.- power .in an opposite direction and -force the valvestem K toitsleft position to seat the 2o valves.`J and J' Afirmlyon their seats. The valve J is-preferably-tted to slide on the valve-stem 1K and is pressed on by one end of, a spring?, resting at its other endon acol-r This means in -i 2 5 sures airm seating of the valves 'J and J onv lar-J3, secured tothe stemK.

their seats.

The valves J andJ areclosed in case the..l engine lis run with very dry7 steam, so that draining .the cylinder of water is not necesf.

sary. 'In ease of a more vthan normal pressautomatically opened and closed b y the excessof pressure on each stroke of the piston, 'A it being 'understood that the force of the springs L ,only hold the valves closed under normal pressure.

vWhen it is desired to again set the draincock-in operation, the operator pulls on the knob N2, so that the hook N engages the hook 4o K',and thefurther pullon the knob causes the valve-stem K to slide to the Aright to unseat the valves J and J Steam from the cylinder can then Vagain pass into the chambers D' and Dzto act on the valves G and G', respectively, as above described.

If' itis desired, the lever l may be locked in an-intermediate position, so that both valves G argilarepxen. For this purpose a setscrew O is pro ided, screwing in the valve.

5o body D mhaving its inner end O adapted to pass into a transverse opening l2, formed in the lever l. Thus when the set-screw O is screwed inward the point O enters the opening I2, thereby forcing the lever I into a vertical position and lockingit therein. Thus it.

will be seen .that the device operates-automatically for draining both endsof .the cyl'-x inder of waterof condensation withoutloss -of power ofthe motive agent working in. the' `It will further be seenthat the.

6o cylinder. y

operator has full control of .the drain-cock'- that is, can set it out of operation or put'it into operation whenever desired.

ure on the cylinderthe valves .I and J are:

1.` The combination, with the valve-body D, having inlets B C at its ends, leading from the steam-cylinder, chambers D' D?, and the in termediate outlet-chamber E2, having valveseats E E', of the lever I, pivoted at its upper end in the chamber E2 and lhaving stems at its lower end projecting through the valvel seats and provided at their ends in the chambers D' D2 with valves G G', substantially as set forth.

2. In a drain-cock for steam-engine cylinders, the combination, with pipes leading from-the ends o'fthe cylinder, of a valve-body provided with chambers, into which open the said pipes, valve-seats formed in the bottom of the said chambers and opening into a discharge or outlet compartment, valves adapted to be seated on thesaid valve-seatsand arranged to openinwardly into thesaid .chambers, a lever pivoted in the said valve-.body and vprovided at .opposite sides with stems carrying the said valves, and a set-screwscrewing in thesaid valve-body and adapted to engage the saidlever tolock the samein aninvtermediate position to hold :both valves .oi `ltheir seats, substantially. as shown .and described.

3. In a drain-cock for steam-.engine Icylinders, the combination, `with a lvalve-f body formed with two separate and-independent :chambers providedv at their upper ends with aset of valve-seats and another setof .valveseats in the bottomthereof, of pipes leading lfrom the upper set of valve-seats tothe ends of the cylinder, valves adapted to be alternately seated at the same timeon Athe lower valve-seats, and a set ofvalves adapted to -zbe `seated on the upper set of valve-seats, substantially as shown and described.

4. In a drain-cock for steam-enginecylinders, the combination, with a .valve -body formed with two separate and independent `chambersprovided at their upper ends with a set of valveseats and another setfof valveseats in the bottom thereof, of .pipesleading from the upper set of vvalveseats to the ends of -the cylinder, valves adapted tobe alternately seated at the same time on thelowervalveseats, a set of valves adapted to be seated on- 'the upper set of valve-seats, and means, substantially as described, for opening and clos- -ing the said second set of valves, as settorth.

I 5. .The combination, with the valve-bodyD, having .two chambers D' .D2 to receive the roo IIO

water of condensation, and .the inlet-valve lseats `D3 D4,'of the sliding rod. having two valves, one in each chamber, seating simul- .taneously on said seats, and means for operating the rod from the outside of the valvebody, substantially as setforth.

6. The combinatiomwith the valve-bodyl), its separate chambers `D D?, and ,the inletl valves DBD4 in` said chambers, ofthe slidingA Having thus fullydescribedmy invention,"

65` I claim as new anddesire tosecure by Letters,

' avalvel-seat J'-,seating on theseat.D4,and the atits lnner end, seating onthe valve-seat D,

sliding rod N, adapted at its inner end to en-V -ter chambers to close over said seats, springs gage the valve J and the valve-rod, substanin the chamber D5, connected tothe said valvetially as set forth. rod, and the sliding rod.N, having a hooked 7. `The combination, with the valve-body inner end engaging the similarly-formed end 5 having end chambers D provided with alteri ofthe valve-rod, substantially as set forth.

nately opening and closing outlet-valves,

aligned inlet-galve seats, and a chamber D?! ROY PETER CAPWELL' between said seats, of the sliding rod extend- Witnesses: ,l

ing thro'ugh Athe chamber D5 intochambers DAVID PEGGS,

ro D D2 and having a valve in both of the lat- JoHr C. STILES. 

